Enhanced hole injection into indium-free organic red light-emitting diodes by fluorine-doping-induced texturing of a zinc oxide surface

Yong June Choi, Su Cheol Gong, Kyung Mun Kang, Hyung Ho Park

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We investigated the effect of fluorine (F)-doping-induced texturing of a zinc oxide (ZnO) surface to enhance the hole injection properties of an organic light emitting diode (OLED) device. In this work, 250 nm thick ZnO anodes doped with 0, 0.2, 0.5, and 0.7 at.% F were grown on liquid crystal display (LCD) glass substrates by atomic layer deposition (ALD) at a low temperature (140 °C). The sheet resistance of undoped ZnO and F-doped ZnO (ZnO:F) anodes decreased with increased F-doping in the ZnO matrix. Conversely, the work functions of the doped ZnO anodes gradually increased with the increase in surface texturing caused by an increase in the amount of exposed (100) planes. Finally, the best OLED performance was obtained for a ZnO anode containing 0.5 at.% F; the work function value of this film was 4.74 eV. The highest luminance and current density values (at a bias of 20 V) were optimized to be 13509.55 cd m-2 and 247.98 mA cm-2, respectively. These superior properties were obtained in an OLED device composed of a DNTPD/TAPC/Bebq2:10%-doped RP-411/Bphen/LiF/Al structure on a ZnO:F anode containing 0.5 at.% F. This journal is

Original languageEnglish
Pages (from-to)8344-8349
Number of pages6
JournalJournal of Materials Chemistry C
Volume2
Issue number39
DOIs
Publication statusPublished - 2014 Oct 21

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Zinc Oxide
Indium
Fluorine
Texturing
Zinc oxide
Light emitting diodes
Doping (additives)
Anodes
Organic light emitting diodes (OLED)
Atomic layer deposition
Sheet resistance
Liquid crystal displays
Luminance
Current density
Glass

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

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title = "Enhanced hole injection into indium-free organic red light-emitting diodes by fluorine-doping-induced texturing of a zinc oxide surface",
abstract = "We investigated the effect of fluorine (F)-doping-induced texturing of a zinc oxide (ZnO) surface to enhance the hole injection properties of an organic light emitting diode (OLED) device. In this work, 250 nm thick ZnO anodes doped with 0, 0.2, 0.5, and 0.7 at.{\%} F were grown on liquid crystal display (LCD) glass substrates by atomic layer deposition (ALD) at a low temperature (140 °C). The sheet resistance of undoped ZnO and F-doped ZnO (ZnO:F) anodes decreased with increased F-doping in the ZnO matrix. Conversely, the work functions of the doped ZnO anodes gradually increased with the increase in surface texturing caused by an increase in the amount of exposed (100) planes. Finally, the best OLED performance was obtained for a ZnO anode containing 0.5 at.{\%} F; the work function value of this film was 4.74 eV. The highest luminance and current density values (at a bias of 20 V) were optimized to be 13509.55 cd m-2 and 247.98 mA cm-2, respectively. These superior properties were obtained in an OLED device composed of a DNTPD/TAPC/Bebq2:10{\%}-doped RP-411/Bphen/LiF/Al structure on a ZnO:F anode containing 0.5 at.{\%} F. This journal is",
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Enhanced hole injection into indium-free organic red light-emitting diodes by fluorine-doping-induced texturing of a zinc oxide surface. / Choi, Yong June; Gong, Su Cheol; Kang, Kyung Mun; Park, Hyung Ho.

In: Journal of Materials Chemistry C, Vol. 2, No. 39, 21.10.2014, p. 8344-8349.

Research output: Contribution to journalArticle

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